Improvement in water-heaters



D. SNHTH 8L J. LYNCH.

improvement in Water Heaters.

Patented june 13, 187i.

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UNITED S'ra'rns A'rnnr IMPROVEMENT IN WATER-HEATERS.

Specification forming part of Letters 'Patent No. 115,901, dated June 13, 1871.

To all whom 'it may con-cern:

Be it known that We, DAVID SMITH and JOHN LYNGH,'of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Tater- Heater; and We do hereby decla-re that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part ot' this speciiication.

This invention relates to a new and useful improvement in apparatus for heating Water, designed more especially for warming greenhouses with hot Water, but applicable to other purposes, and it consists, mainly, in a celled tire-box made in a single piece. It also consists in the general construction, arrangement, and combination of parts hereinafter more fully described.`

In the accompanying drawing, Figure l represents a vertical longitudinal central section of the apparatus. Fig. 2 is avertical section of Fig. l taken on the line rc. Fig. 3 is a vertical section of Fig. l taken on the liney y. Fig. 4 is a horizontal and vertical section of Fig. 1 on the line z z.

Similar letters `ci? reference indicate correspondingparts.

A is the base, which ineloses the grate B and ash-pit O. D is the tire-box, cast in a single piece, attached to the base by a Watertigbt joint, as seen at E. F is the shell surrounding the nre-box. G represents the cells of the tire-box, seen in cross-section in Fig. 4. This formation of the tire-box gives a very large area of heating surface and enable us to make our heater Yery compact. H is a Waterback or bridge-wall cast with the fire-box,

which is in communication with the rear cells yof the {ire-box, as seen in Fig. l. I is the llueorice above the Water-back H. J is the driving-flue behind the Water-back. IE is a smokeboX, back of the ash-pit, into which the smoke and products of combustion are discharged by the tine J. L is the exit-tine, which conducts the smoke to the chimney. The Water is in,- trodueed into the heater at'N and discl'iarged at O.

Then the heater is employed for heating Water simply, a water-cock may be attached at any convenient point. For Warming greenhouses 0r buildings, the two pipes N O are united and a circulation is thus produced.

I? is the dooraperture for the introduction of the fuel. A Water-tight joint is made around the door as Well as at the base of the tire-box.

By this arrangement it will be seen that the Water surrounds the fire-box in a thin sheet, entering the cells and the back or bridge-Wall and absorbing heat from a Very extended surA face, and that fuel in the fire-box can be used to the very best advantage.

Having thus described 'our invention, we claim as new and desire to secure by Letters Patentl. The {ire-box D, (with the cells G and Water-back H,) cast ina ,single piece, substantially as and for the purposes described.

2. The combination of the shell F and base A with the tire-box D, arranged substantially as and for the purposes herein shown and described.

DAVID SMITH. JOHN LYNCH. Vitnesses:

JAMES Monnrsorf, ANDREW J. AGNEW. 

